Rupee symbol may take a while to appear on the keyword but can right away be type as a   character, Mangalore based Foradian Technologies has created a font called Rupee_Foradian,

It can download form company blog site  Rupee symbol

How to use In windows based System

1. Download the font from the above link

2. Install the font. (It is easy. Just copy the font and paste it in “Fonts” folder in control panel)

Press ~ key